Paving-block



R. H. IRONS.

PAVING BLOCK.

APPLICATION FILED JUNE 5. 1919.

1,344,895, Patented June 29, 1920.

6 and State of a new and useful Improvement in Paving- UNITED STATESPATguriomcs.."

noBEn'r n'. mo1vs, or rinnnrsnune, PENNSYLVANIA.

ravine-mock.

To all whom it may concern: 1

Be it known that I, Ronnn'r H. Irons, a citizen of the United States,and aresident of Harrisburg in the county of Dauphin Iennsylvania, haveinvented Blocks; and I do hereby declarethe follow-. ing to be a full,clear, and exact description thereof.

and more especially to one adapted for use in connection with steel orlike plants.

In open hearth steel poundin of the materials heretofore generally emploed The steel plate charging floor of t e or paved" dinary open hearthplant is usuall with bricks to protect it from sucli s ills and runsofliquid metal. In case 0 an overflow or a breakout from an open hearthfurnace the metal or slag overrunning the floor will fill the crevicesin the brickwork,

and thus make a firm bond with the pavement. In removing the metal andslag the bricks often stick to the same, causing the furnace withoutbreakin and separating it from the paving material. Furthermore unlessthe pavement is promptly repairedv after such overflow or breakout thevibration of the charging floorwill have a disastrous eflect on-thepaving adjacent to the original break. In cases when concrete is .usedas paving material it is bound to crack and disintegrate wherever thefloor is sub- 'ect to excessive heat from checker chamliers or fluesunderneath the charging floor. A spill of liquid metal or slag will, ofcourse, destroy or damage whatever portion of the concrete pavement itcomes in contact with.

The vibration and poundin to which these pavements are subjec is causedchiefly by the advancing and withdrawing of the charging machines andcharging trucks, and will-sooner or later cause the pavement to crackand work loose from the}, steel flooring permitting dirt-to work down'through the cracksand underneath the I pavement, thus raising anddestroying the same.

' To, these ends my invention consists gener- My invention relates to apaving block set forth and claimed. plants the chargin floors aresubject to spills of liquid meta and slag as well as to severe vibrationandwhich causes rapid destruction oors when made of the flooring ing themetal-unfit for recharging into the excessive and the pounding of thefloor not too bl upper faces of the b Specification ot Letter's Patent.Patentgd Ji n 29 1920.

Application filed rurjitr' s, .1919. Serial in. 301,952. v

maintenance of the charging quite a troublesome matter, and the objectof my invention is to overcome thesec difliculties.

ally stated in a steel box, either'pressed or cast, open on one side,and forming a paw-.-

"ing block which is adapted to be-laid with. its'open side down eitherdirectlyon top of .the steel plate charging floor or embedded in a layerof; sand, fire-clay, cement or other suitable material, all as fullyhereinafter blocks; Fig. a cross section; Fig. 4 a perspectivev1ew;,-and Fig. 5 a modified 75 form.

In the drawing the numeral 2* desi ates a block which is formedpreferably" 0 steel plate pressed to shape in suitable dies and forminga hollow box-like structure with,-

the openside.:3.- Inpressin from a"- plate of proper shape an h,'t'ifljle dies the metal .at the corners can I made to extend spmewhatbe 0nd the sidesso that the feet 4 are rovide which sup rtthe block, andas said feet extend beyon the sides and ends there will be spaces 5furnishing access to the inside of the block. This will rmit any surplusof dirt collecting in the' oints between the blocks to work in under theblocks without an damage to the pavement, there being su cient spaceinside the gent it may be advantageous to 'set the 0c in cement orconcrete -The blocks Lare laid close to one another inthe manner oflaying bricks and to prevent slipping the locks should be riflled orstuddedlas at 8.-

iofthe fact that each considerable wei ht and at the same timeverysniall bearing ace on the floor proper,

the.- blocks' will stay in position. and no binder iis neczasa to holdthe blocks together or hold them down to the flooring,

so that free expansion and contraction are always possible throughoutthe whole floor area.

Any dirt which works its way in under the blocks through the openings 5can have no tendency to raise the block and cause un evenness due to thefact that the large open space inside the block is capable of takingcare of any such dirt.

The blocks can readily be laid to make a level floor surface due to thesmall bearing areas at the corners only of the block, which design makesit possible to avoid resting the individual blocks on rivet heads orseams in the floor structure.

The pounding or vibration can do no danr age to the pavement when nobinding material is used, due to the weight of the blocks,

the small bearing surface on the floor and the great strength of theindividual blocks. Furthermore, when no binding material is used it ispossible to readily replace individual blocks and any damage to thepavement can be quickly and readily repaired, while the damaged blockswhen removed have a value as scrap, and where they are used on an openhearth charging floor they ma be charged directly into the furnace.

he blocks may be made of scrap plate and so produced at low cost,although I do not wish to limit myself to boxes made of plate metal asthe boxes might be cast if desired.

It will, of course, be apparent that any spills of metal or slag on afloor of this character will not do any great amount of damage, as theslag is easily removed and any metal that sticks to the pavement mayreadily be lifted from the floor together with the paving blocks and, ifdesirable, charged directly into the furnace including the blocks, whichlatter can be replaced with little trouble.

In Fig. 5 I have shown a block of hexagonal form and it is apparent thatany other suitable form may be adapted.

hat I claim is:

l. A hollow unfilled paving block consisting of a box of regular shapehaving the bottom open and provided with means for furnishingcommunication with the interior of the block when the block is inposition.

2. A hollow unfilled paving block formed of metal, having one open side.the metal at the corners projecting slightly beyond the sides and endsto form openings communicating with the interior of the block when theblock is in position.

3. A hollow unfilled paving-block formed of metal, having one open sideand feet at the corners projecting beyond the sides and ends of the box.forming openings communicating with the interior of the box when theblock is in position.

i. A hollow unfilled paving-block formed of metal, having one open sideand reduced wall portions whereby when said block is laid open side downsaid reduced portions form openings communicating with the interior ofsaid block.

In testimony whereof I. the said Roman H. Inoxs, have hereunto set myhand.

- ROBERT H. IRONS 'itnesses V31. Bnowx, Gtsr. L. FIsK.

